objstdif.cxh

// Standard interfaces that have special meaning within the framework
 
interface Sortable {
    intptr cmp(object other, uint32 flags);
}
 
interface Hashable {
    uint32 hash(uint32 flags);
}
 
interface Convertible {
    // NOTE: While this is used by stConvert, the object interface is a higher level interface.
    // The normal convention of blindly overwriting the destination does not apply here. For
    // example, when called to convert to a string, the destination should be properly reused
    // or destroyed first.
    // The layer between stConvert and Convertible takes care of making sure the destination is
    // always initialized.
    bool convert(stype st, stgeneric *dest, uint32 flags);
}
 
interface IteratorIf {
    bool valid();
    bool next();
    bool get(stvar *out);
}
 
abstract class Iterator implements IteratorIf {
}
 
interface Iterable {
    Iterator *iter();               // Caller owns the iterator and must release it with objRelease
}